| Acronym | Definition |
|---|
| ISW | Institute for the Study of War (Washington, DC) |
| ISW | Wisconsin Rapids, Wisconsin (Airport Code) |
| ISW | Interstellar War |
| ISW | Inter-Switch |
| ISW | Inclusive Schools Week |
| ISW | Information Service Workstation |
| ISW | Institut für Steuerungstechnik der Werkzeugmaschinen und Fertigungseinrichtungen (Institute for Control Engineering of Machine Tools and Manufacturing Units, University of Stuttgart, Germany) |
| ISW | Integrated Switch |
| ISW | Integrated Strike Warfare |
| ISW | Information Survivability Workshop |
| ISW | In-Service Workshop (various organizations) |
| ISW | Integrated Sachs-Wolfe Effect |
| ISW | Inn - Salzach - Welle (German radio station) |
| ISW | Institut für Städtebau Und Wohnungswesen, München (Deutsche Akademie für Städtebau und Landesplanung) |
| ISW | Inside Wire |
| ISW | Islamic Society of Wichita (Kansas) |
| ISW | International School Wiesbaden |
| ISW | Ingest Subsystem Workstation (AFWA satellite ingest processing system) |
| ISW | Information Survivability Workshops (IEEE) |
| ISW | Internet Survey Watching |
| ISW | International Symposium on Wikis |
| ISW | Information Systems Worldwide |
| ISW | Inbound Signaling Word |
| ISW | Impact Soundworks (est. 2007) |
| ISW | Insanely Suicidal Wrestling |
| ISW | Industrial Safety World |
| ISW | International Spine Watchers |
| ISW | Improper Surface Wave |
| ISW | Invisible Sky Wizard (Internet slang) |
| ISW | Installers Service Warehouse, Inc |